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zaharov [31]
3 years ago
8

What is an indicator? What does it tell you about solutions?

Chemistry
2 answers:
WARRIOR [948]3 years ago
7 0

Answer:

Pure water is neutral, and so is petrol. An indicator is a substance that changes colour when it is added to acidic or alkaline solutions. You can prepare homemade indicators from red cabbage or beetroot juice - these will help you see if a solution is acidic or alkaline.

Sophie [7]3 years ago
3 0

Answer:

Explanation:

The common application of indicators is the detection of end points of titrations. The colour of an indicator alters when the acidity or the oxidizing strength of the solution, or the concentration of a certain chemical species, reaches a critical range of values.

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3 years ago
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1 moL of a substance is equal to 6.02 x 1023 atoms or particles<br> True or false
dimulka [17.4K]

1 moL of a substance is equal to 6.02 x 10^23 atoms or particles , it true statement. This number is known as Avogadro number.  

5 0
3 years ago
PLS ANSWER FAST THANK UU
andriy [413]
Answer
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Explanation
4 0
3 years ago
A weather balloon is filled with helium that occupies a volume of 500 L at 0.995 atm and 32.0 ℃. After it is released, it rises
Yuki888 [10]

Answer : The volume of the balloon at the new location is, 591.3 L

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.995 atm

P_2 = final pressure of gas = 0.720 atm

V_1 = initial volume of gas = 500 L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 32.0^oC=273+32=305K

T_2 = final temperature of gas = -12^oC=273+(-12)=261K

Now put all the given values in the above equation, we get:

\frac{0.995atm\times 500L}{305K}=\frac{0.720atm\times V_2}{261K}

V_2=591.3L

Therefore, the volume of the balloon at the new location is, 591.3 L

3 0
4 years ago
1. True or false ? Balanced forces cause a change in motion. How do you know this ?
MariettaO [177]

Answer:

1. False

Balanced forces would mean all forces acting upon an object would be equal. So there is no movement.

2. True

Unbalanced forces would mean there is a force acting upon a side of tge object, causing it to move in a direction.

4 0
3 years ago
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